<template>
    <div>
      <!--面包屑导航区-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>

      <!--卡片视图区-->
      <el-card>
        <!--提示警告区域-->
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <!--步骤条-->
        <!--:active绑定的值应该是数字，但是tabs传过来的值是name字符串，所以要减去0-->
        <el-steps :space="200" :active="activeIndex -0 " finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>

        <!--tab栏区域-->
        <!--用form表单包裹其外-->
        <el-form :model="addForm" :rules="addFormRules" ref="ruleFormRef" label-width="100px" label-position="top" >
        <el-tabs :tab-position="'left'" style="height: 730px;" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <!--用type="number"指定输入永远是数字-->
            <el-form-item label="商品价格" prop="goods_price" >
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>

            <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader expand-trigger="hover"
                         v-model="addForm.goods_cat" :options="catelist"
                         :props="cateProps"
                         @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!--复选框-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox  v-for="(cb, i) in item.attr_vals" :label="cb" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals">

              </el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--图片上传的API地址-->
            <!--问题：重要！！！！！这里上传地址没有发axios请求，所以没有调用token，所以应该设置上传的请求头-->
            <el-upload :action="uploadURL" :headers="headerObj"
               :on-remove="handleRemove" :on-success="handleSuccess" :on-preview="handlePreview"
              list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
<!--富文本编辑器-->
            <!-- bidirectional data binding（双向数据绑定） -->
            <quill-editor v-model="addForm.goods_introduce"
                          ref="myQuillEditor">
            </quill-editor>

            <!--按钮-->
            <el-button type="primary" class="addMargin" @click="add">添加商品</el-button>
          </el-tab-pane>

        </el-tabs>
        </el-form>
        <el-row :gutter="20">
          <el-col :span="8">
          </el-col>
        </el-row>
      </el-card>

      <!--图片预览-->
      <el-dialog title="图片预览" :visible.sync="PicsVisible" width="50%" >
        <img :src="previewPath" alt="" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
  import _ from 'lodash'
    export default {
        name: "add",
      data(){
          return{
            activeIndex:0,
            //添加商品的表单数据
            addForm:{
              goods_name:'',
              goods_price:0,
              goods_weight:0,
              goods_number:0,
              //商品所属的分类数组
              goods_cat:[],
              //图片数组
              pics:[],
              //商品的详情描述
              goods_introduce:'',
              attrs:[]
            },
            addFormRules:{
              goods_name:[
                {required:true,message:'请输入商品名称',trigger:'blur'}
              ],
              goods_price:[
                {required:true,message:'请输入商品价格',trigger:'blur'}
              ],
              goods_weight:[
                {required:true,message:'请输入商品重量',trigger:'blur'}
              ],
              goods_number:[
                {required:true,message:'请输入商品重量',trigger:'blur'}
              ],
              goods_cat:[
                {required:true,message:'请输入商品分类',trigger:'blur'}
              ]
            },
            //商品分类列表
            catelist:[ ],
            cateProps: {
              label:'cat_name',
              value:'cat_id',
              children:'children'
            },
            //获取商品动态参数的列表数组
            manyTableData:[ ],
            /*静态属性*/
            onlyTableData:[],
            //图片上传的URL
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            //图片上传的请求头
            headerObj:{ Authorization: window.sessionStorage.getItem('token')},
            //接收预览图片地址
            previewPath:'',
            //图片预览显示与隐藏
            PicsVisible:false
        }
      },
      created() {
          this.getCateList()
      },
      methods:{
        async getCateList(){
          const {data:res}= await this.axios.get('categories')
          if (res.meta.status !== 200){
            this.$memege.error('获取分类列表失败！')
          }
          console.log(res.data);
          this.catelist = res.data
        },
        handleChange(){
          console.log(this.addForm.goods_cat);
          //拍段数组是否为3，如果不为3 则不选中 !!!!!important
          if (this.addForm.goods_cat.length !==3){
            this.addForm.goods_cat = [ ]
          }
        },
        beforeLeave(activeName, oldActiveName){
          if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
            this.$memege.error('请先选择商品分类')
            return false
          }
        },
       async tabClicked(){

       if (this.activeIndex === '1'){
         const {data:res} = await this.axios.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
          if (res.meta.status !== 200){
            this.$memege.error('获取动态参数列表失败！')
          }
         this.manyTableData = res.data
         res.data.forEach(item=>{
           item.attr_vals = item.attr_vals.length === 0 ? []:item.attr_vals.split(' ')
         })
       }
       /*如果this.activeIndex === '2'是获取静态属性*/
       else if(this.activeIndex === '2'){
        const {data:res}= await  this.axios.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
         if(res.meta.status !== 200){
           return this.$memege.error('获取静态属性失败！')
         }
         this.onlyTableData = res.data
       }
       },
        /*图片预览功能*/
        handlePreview(file){
             this.previewPath = file.response.data.url
             this.PicsVisible = true
        },
        //移除图片
        handleRemove(file){
          //1.获取图片临时路径
          const filePath = file.response.data.tmp_path
          //2.从pics数组中，找到图片的索引值,findIndex返回对象的索引值i
         const i = this.addForm.pics.findIndex(x=>x.pic = filePath)
          //3.调用数组的 splice 方法，把图片信息对象从pics数组中删除
          this.addForm.pics.splice(i,1)
          console.log(this.addForm);
        },
        //监听图片上传成功的事件
        handleSuccess(response){
          console.log(response);
          //1.拼接得到一个图片信息对象
          const picInfo = { pic:response.data.tmp_path}
          //2.将图片信息对象push到pics数组
          this.addForm.pics.push(picInfo)
        },
        //添加表单的验证,添加商品
        add(){
          this.$refs.ruleFormRef.validate(async valid=>{
            if (!valid){
              return this.$memege.error('添加表单验证未通过！')
            }
            //执行添加请求
            //请求的时候goods_cat比较特殊，是一个数组，应该改造成字符串，用join(',')
            //!!!!! this.addForm.goods_cat是通过v-model双向绑定到级联选择器，所以在函数中虽然转成字符串但是还不行，要深度拷贝，lodash cloneDeep(obj)
           const form = _.cloneDeep(this.addForm)
            form.goods_cat = form.goods_cat.join(',')

            //处理动态参数
              this.manyTableData.forEach(item=>{
                const newInfo = {
                  attr_id:item.attr_id,
                  attr_value:item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newInfo)
              })
            //处理静态属性
            this.onlyTableData.forEach(item=>{
              const newInfo = {
                attr_id:item.attr_id,
                attr_value:item.attr_vals
              }
              this.addForm.attrs.push(newInfo)
            })

            form.attrs = this.addForm.attrs
            console.log(form);

            //发起请求
            //商品名称必须唯一
           const {data:res}= await this.axios.post(`goods`,form)
            if (res.meta.status !== 201) {
              return this.$memege.error('添加商品失败')
            }
            console.log(res);
            this.$memege.success('添加商品成功！')
            this.$router.push('/goods')
          })
        }
      },
      computed: {
          cateId() {
            if (this.addForm.goods_cat.length === 3){
              return this.addForm.goods_cat[2]
            }
            return null
          }
      }
    }
</script>

<style scoped>
.el-steps{margin: 15px 0;}
.el-step__title{font-size: 13px}
  .el-tag{margin: 0px 10px}
  .previewImg{width: 100%}
  .addMargin{margin: 15px 0}
</style>
